Feeder Link

A feeder link is the portion of a broadcasting-satellite system which provides the connection from the earth to the broadcasting satellite. Quality Objectives for feeder links are normally well above the corresponding objectives for downlinks. The parameters which affect signal quality are examined. It is shown that the greatest control over the C/N ratio lies with the selection of suitable values for the diameter of the feeder link transmit antenna and the power of its associated transmitter. Three mechanisms are available to combat interference between feeder links: discrimination resulting from the feeder link transmit antenna pattern, discrimination derived from the satellite receive antenna pattern, and discrimination due to the use of cross-polarized signals. The use of these mechanisms to create a workable feeder link plan is developed in the paper. There are a number of desirable objectives that can be established for a feeder link plan in addition to the obvious need to meet signal quality (C/N) and interference (C/I) requirements

Also A radio link from an Earth station at a given location to a space station, or vice versa, conveying information for a space radio communication service other than for the fixed-satellite service. The given location May Be at a specified fixed point, or at any fixed point within specified areas.